<template>
  <div class="about">
    <h1>{{id? '编辑': '新建'}}文章</h1>
    <el-form label-width="120px" @submit.native.prevent="save">
      <el-form-item label="所属分类">
        <!--一个文章存在多个类型的分类-->
        <el-select v-model="model.categories" multiple>
          <el-option v-for="item of categories" :key="item._id"
                     :label="item.name" :value="item._id">
          </el-option>
        </el-select>
      </el-form-item>
      <el-form-item label="标题">
        <el-input v-model="model.title"></el-input>
      </el-form-item>
      <el-form-item label="内容">
        <vue-editor useCustomImageHandler
                    @image-added="handleImageAdded"
                    v-model="model.body"></vue-editor>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" native-type="submit">保存</el-button>
      </el-form-item>
    </el-form>
  </div>

</template>
<script>
  import { VueEditor } from "vue2-editor";
  export default {
    props: {
      id: {}
    },
    data(){
      return {
        model: {},
        categories: []
      }
    },
    components: {
      VueEditor
    },
    methods: {
      async save() {
        console.log('save');
        //请求一个接口，进行数据的提交
        //   let res;
        if (this.id) {
          await this.$http.put(`api/articles/${this.id}`, this.model)
        } else {
          await this.$http.post('api/articles', this.model)
        }
        //页面进行重定向
        this.$router.push('/articles/list');
        this.$message({
          type: 'success',
          message: '保存成功'
        })
      },

      async fetch() {
        const res = await this.$http.get(`api/articles/${this.id}`)
        this.model = res.data
      },

      async fetchCategories() {
        const res = await this.$http.get(`api/categories`)
        this.categories = res.data
      },

      async handleImageAdded(file, Editor, cursorLocation, resetUploader) {
        const formData = new FormData();
        formData.append("file", file);

        const res = await this.$http.post('upload', formData)
        Editor.insertEmbed(cursorLocation, "image", res.data.url);
        resetUploader();

      },
    },
    created () {
      this.fetchCategories()
      this.id && this.fetch()
    }
  }
</script>
